База данных: Статьи
Страница 1, Результатов: 2
Отмеченные записи: 0
1.
Подробнее
35
D99
Dzhumadullaeva, S. A.
The kinetics of selective hydrazinolysis of maleic acid on the acid catalyst. [Текст] / S. A. Dzhumadullaeva, A. B. Bayeshov, A. V. Kolesnikov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 53-57
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
maleic acid -- hydrazinolysis -- hydrazide -- catalyst
Аннотация: For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant (k) was calculated from the second-order reaction rate equation. The effect of initial concentrations of maleic acid and hydrazine hydrate, the temperature on the reaction rate was studied. The first order of maleic acid and hydrazine hydrate is determined. Activation energy of the process found from the Arrhenius dependence is 32,1 kJ/mol. On the basis of kinetic and IR spectroscopic methods, a probable reaction mechanism involving polymer-bound hydrogen ions is proposed.
Держатели документа:
WKU
Доп.точки доступа:
Bayeshov, A.B.
Kolesnikov, A.V.
D99
Dzhumadullaeva, S. A.
The kinetics of selective hydrazinolysis of maleic acid on the acid catalyst. [Текст] / S. A. Dzhumadullaeva, A. B. Bayeshov, A. V. Kolesnikov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 53-57
Рубрики: chemical Technology
Кл.слова (ненормированные):
maleic acid -- hydrazinolysis -- hydrazide -- catalyst
Аннотация: For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant (k) was calculated from the second-order reaction rate equation. The effect of initial concentrations of maleic acid and hydrazine hydrate, the temperature on the reaction rate was studied. The first order of maleic acid and hydrazine hydrate is determined. Activation energy of the process found from the Arrhenius dependence is 32,1 kJ/mol. On the basis of kinetic and IR spectroscopic methods, a probable reaction mechanism involving polymer-bound hydrogen ions is proposed.
Держатели документа:
WKU
Доп.точки доступа:
Bayeshov, A.B.
Kolesnikov, A.V.
2.
Подробнее
35
K17
Kairbekov, Zh. K.
Investigation of the catalytic and isomerization activity of multi-component skeletal nickel catalysts in the hydrogenation of hexene -1. [Текст] / Zh. K. Kairbekov, S. M. Suimbayeva, I. M. Jeldybayeva, E. T. Yermoldina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - p. 58-64
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
catalyst -- hydrogenation -- hexеne-1 -- skeletal nickel -- activity -- selectivity -- migration -- alloy
Аннотация: In this work, the effect of the amount of catalyst, modifying additives, and the phase composition of the alloys on the catalytic and isomerizing activity of skeletal in the hydrogenation reaction of hexane-1 is investigated.
Держатели документа:
WKU
Доп.точки доступа:
Suimbayeva, S. M.
Jeldybayeva, I. M.
Yermoldina, E. T.
K17
Kairbekov, Zh. K.
Investigation of the catalytic and isomerization activity of multi-component skeletal nickel catalysts in the hydrogenation of hexene -1. [Текст] / Zh. K. Kairbekov, S. M. Suimbayeva, I. M. Jeldybayeva, E. T. Yermoldina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - p. 58-64
Рубрики: chemical Technology
Кл.слова (ненормированные):
catalyst -- hydrogenation -- hexеne-1 -- skeletal nickel -- activity -- selectivity -- migration -- alloy
Аннотация: In this work, the effect of the amount of catalyst, modifying additives, and the phase composition of the alloys on the catalytic and isomerizing activity of skeletal in the hydrogenation reaction of hexane-1 is investigated.
Держатели документа:
WKU
Доп.точки доступа:
Suimbayeva, S. M.
Jeldybayeva, I. M.
Yermoldina, E. T.
Страница 1, Результатов: 2